Sorry, @CCTG - everything works fine  
I just fell for the wrongful impression that I should find #CoronaWarnCompanion when I choose to export from the diary instead of the contact heat map 

Hey @CCTG,
After installing the new update it seems that I can't get the #CoronaWarnCompanion app to work anymore  
It doesn't even appear in the list of apps to export data to 🤷
(Huawei #P20pro, not rooted, Android 10.0.0.185, #CWC 2.1.1.2001001 from org.tosl.coronawarncompanion)

Thanks, @maze, I'll definitely have a look at the #CoronaWarnCompanion as well 🤓